I am part of a group that has gone to Hollenbeck Park multiple times. Lots of grass (no dust). A stream runs through the campground, a great place for kids to play. A great place for group reunions. Lots of trees for shade and a AWESOME view of Mt. Adams. For those that need to stay in contact with the world there is cell service. (AT&T and US Cellular). The campground is not far from Trout Lake. The campground is in a secluded area so it is very quiet.
Nice semi secluded campsites with amazing views of mount Adams. Only downside would be no showers or flush toilet/potable water. There are ac outlets available at some sites but no camper hookups.
Great campsite with incredible views of Mt Adams. $30 per night gets you drinking water, porta potties, and electrical outlets.